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  1. D300 大学院環境学研究科
  2. D300a 雑誌掲載論文
  3. 学術雑誌

Dual stable isotope characterization of excess methane in oxic waters of a mesotrophic lake

http://hdl.handle.net/2237/00033197
http://hdl.handle.net/2237/00033197
18c33981-2ea8-4c36-8052-214e77815fa6
名前 / ファイル ライセンス アクション
Tsunogai_LO_2020.pdf Tsunogai_LO_2020 (2.3 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2020-12-15
タイトル
タイトル Dual stable isotope characterization of excess methane in oxic waters of a mesotrophic lake
言語 en
著者 Tsunogai, Urumu

× Tsunogai, Urumu

WEKO 102546

en Tsunogai, Urumu

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Miyoshi, Yuko

× Miyoshi, Yuko

WEKO 102547

en Miyoshi, Yuko

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Matsushita, Toshiyuki

× Matsushita, Toshiyuki

WEKO 102548

en Matsushita, Toshiyuki

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Komatsu, Daisuke D.

× Komatsu, Daisuke D.

WEKO 102549

en Komatsu, Daisuke D.

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Ito, Masanori

× Ito, Masanori

WEKO 102550

en Ito, Masanori

Search repository
Sukigara, Chiho

× Sukigara, Chiho

WEKO 102551

en Sukigara, Chiho

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Nakagawa, Fumiko

× Nakagawa, Fumiko

WEKO 102552

en Nakagawa, Fumiko

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Maruo, Masahiro

× Maruo, Masahiro

WEKO 102553

en Maruo, Masahiro

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
抄録
内容記述 To determine the source of excess methane in oxic, surface‐water columns often found in freshwater environments, we measured the in situ concentration and stable isotopic compositions (δ13C and δ2H) of methane in Lake Biwa, a mesotrophic lake in Japan. The values from the littoral zone and lake‐floor sediments were determined, besides those in the water column of the pelagic zone. Furthermore, we conducted incubation experiments to measure microbial oxidation rates and alterations in the isotopic signatures of methane. We found significant vertical and seasonal variations in both in situ concentrations and stable isotopic compositions of methane measured in the pelagic zone. We concluded that active microbial oxidation was primarily responsible for the variation in δ13C and δ2H values of methane in the pelagic water column. As a result, we defined a new indicator Δ(2,13) to characterize the sources of dissolved methane, in which variations in both δ13C and δ2H during methane oxidation had been corrected. The excess methane in oxic, surface‐water columns exhibited Δ(2,13) values similar to those in the littoral zone. We concluded that excess methane at the surface of the pelagic zone originated from the littoral zone via lateral transport. Anoxic near sediments and inflowing rivers were responsible for methane enrichment in water of the littoral zone and in the surface water columns of the pelagic zone.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 Wiley
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1002/lno.11566
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0024-3590
書誌情報 en : Limnology and Oceanography

巻 65, 号 12, p. 2937-2952, 発行日 2020-12
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